Heater Issue

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Plimbob

Full Access Member
Joined
Sep 5, 2014
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Location
Des Moines Iowa
I am having two issue with my 07 Tahoe:

1. Blows cool air out of passenger side lower vent but blows warm out of the other vents (maybe blend door motor)?
2. Only blows warm not hot air out of vents even when turned up to 90 degrees.

The vehicle has 246,000 and the heater core hasn't been backflushed since I have owned it (37,000 miles) The enire cooling system was flushed at 125,000 but nothing since.

I was wondering if the HVAC should be recalibrated?

Any thoughts would be appreciated, it's been colder that !@#$ here in Iowa and a properly working heater would be nice!
 

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